package com.xiaomei.manager.web.Interceptor;

import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
public class CommonInterceptor extends HandlerInterceptorAdapter {
	private static Logger logger= Logger.getLogger(CommonInterceptor.class);
    /**  
     * 在业务处理器处理请求之前被调用  
     * 如果返回false  
     *     从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链 
     * 如果返回true  
     *    执行下一个拦截器,直到所有的拦截器都执行完毕  
     *    再执行被拦截的Controller  
     *    然后进入拦截器链,  
     *    从最后一个拦截器往回执行所有的postHandle()  
     *    接着再从最后一个拦截器往回执行所有的afterCompletion()  
     */    
    @Override    
    public boolean preHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler) throws Exception {    
    	logger.info("-------------- request info start --------------");
		logger.info(request.getRequestURL());
		logger.info(request.getMethod());
		logger.info(request.getContentType());
		@SuppressWarnings("unchecked")
		Enumeration<String> paraNames = request.getParameterNames();
		for(Enumeration<String> e = paraNames; e.hasMoreElements();){
		       String thisName = e.nextElement().toString();
		       String thisValue = request.getParameter(thisName);
		       logger.info(thisName + "=" + thisValue);
		}
		
		
		logger.info("-------------- request info end --------------"); 
		return true;
    }    
    
    /** 
     * 在业务处理器处理请求执行完成后,生成视图之前执行的动作    
     * 可在modelAndView中加入数据，比如当前时间 
     */  
    @Override    
    public void postHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler,    
            ModelAndView modelAndView) throws Exception {     
    }    
}
